| Suur-Savon Sähkö Oy CVR 0215863-7 | OtherConfidential Clerk | Since 2024 | — | Active |
| Järvi-Suomen Vesi Oy CVR 0981412-3 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Suur-Savon Sähkökone Oy CVR 1004619-2 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Etelä-Savon Vesi Oy CVR 1017068-7 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Sulkavan Lämpö Oy CVR 1017070-8 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Suomen Voimaverkot Oy CVR 1017086-3 | BoardBoard of Directors | Since 2026 | — | Active |
| Jaalan Lämpö Oy CVR 1017092-7 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Anttolan Lämpö Oy CVR 1017097-8 | ManagementChief Executive Officer | Since 2024 | — | Active |
| Leivonmäen Lämpö Oy CVR 1017099-4 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Enonkosken Lämpö Oy CVR 1017103-0 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Hirvensalmen Lämpö Oy CVR 1017243-9 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Kerimäen Lämpö Oy CVR 1017247-1 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Luhangan Lämpö Oy CVR 1017250-0 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Mikkelin Energia Oy CVR 1017252-7 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Pertunmaan Lämpö Oy CVR 1017254-3 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Ristiinan Lämpö Oy CVR 1017268-2 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Savonrannan Lämpö Oy CVR 1017270-3 | ManagementChief Executive Officer | Since 2025 | — | Active |
| Lumme Energia Oy CVR 2038931-6 | BoardBoard of Directors | Since 2026 | — | Active |
| Oomi Oy CVR 3101315-4 | OtherDeputy Member | Since 2026 | — | Active |
| Tallila Sports Oy CVR 3166846-8 | OtherDeputy Member | Since 2020 | — | Active |
